The present paper explores the impact of an on-board hydrogen harvesting system (fuel reformer) on the overall efficiency of a fuel-cell powered vehicle. Various methods of hydrogen production for automotive applications have been discussed first. As the hydrogen production is one of the major challenges for application of proton exchange membrane (PEM) fuel cells, especially in vehicular indus...

the present paper explores the impact of an on-board hydrogen harvesting system (fuel reformer) on the overall efficiency of a fuel-cell powered vehicle. various methods of hydrogen production for automotive applications have been discussed first. as the hydrogen production is one of the major challenges for application of proton exchange membrane (pem) fuel cells, especially in vehicular indus...

background: as students' hookah use has become a widespread problem in the developing countries, it is time to understand the cognitive determinants of students' decisions to do so. this study aimed to investigate the roles of psychological and demographic factors associated with hookah use among male high school students. method s: this descriptive-analytical study was performed among 601 high...

In this study, a robust controller for voltage regulation of the POESLL converter worked in continuous conduction mode is presented. POESLL converter is a DC/DC converter with a high voltage gain. DC/DC converters are used in telecommunication systems, power sources and industrial applications. Owing to the switching operation, the structure of the POESLL converter is highly non-linear. In addi...

− An integrated solution based on CAN protocol, for industrial measurements and control, is presented. Main characteristics of CAN protocol are underlined in terms of OSI model taking particular attention to hardware implementation, messages types, collision resolution mechanisms and timing synchronization. The paper also includes references to another high level industrial protocols that use t...

An aerator, installed to prevent cavitation damages in spillways and outlet works, generates a typical two-phase flow affected by its configuration conditions. The major parameters of concern include air demand, jet trajectory streamwise changes concentration near chute bottom. This study reviews the theoretical basis deals with several aspects physical scale modeling, supported exclusively fie...

Research and development laboratories in universities and firms around the world are trying to maximize innovation with a limited set of resources. However, questions remain about the influence of resource constraints on idea generation in early-stage product design. Multiple embedded case studies were conducted with engineering students and professors at two university campuses in Mexico. Stud...

According to recent technology road maps, system cost reductions and development of standardised plug-and-function systems are some of the most important goals for solar heating technology development. Retrofitting hot water boilers in single-family houses when installing solar collectors has the potential to significantly reduce both material and installation costs. Previous studies have inves...